Some Properties of a Type of Entropy of an Ideal and the Divergence of Two Ideals

The aim of this paper is to study certain properties of the Kullback–Leibler distance between two positive integer numbers or between two ideals. We present some results related to the entropy of a positive integer number and the divergence of two numbers. We also study the entropy of some types of ideals and the divergence of two ideals. Finally, we find some inequalities, involving the entropy H of an exponential divisor of a positive integer, respectively the entropy H of an exponential divisor of an ideal.